Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 5, 2018
Previous Article Next Article

Experimental and theoretical investigation of fluorescence solvatochromism of dialkoxyphenyl-pyrene molecules

Author affiliations

Abstract

We investigated the fluorescence properties of dialkoxyphenyl-pyrene molecules experimentally as well as theoretically. Our experiments confirmed fluorescence solvatochromism in 2,5-dimethoxyphenyl-pyrene and, in contrast there was no significant solvent-effect on the emission properties of the isomers, 3,5- and 2,6-dimethoxyphenyl-pyrene. This clear difference in the solvent-dependence would reflect the difference in character of the excited-state between the isomers, which differ only in the substitution positions of the two methoxy groups. The positional effects of the di-substituted molecules are successfully explained theoretically by the topologies of the highest occupied molecular orbital of the phenyl group that are governed by the relative positions of the two substituents, though it is somewhat contradictory to the meta-effect for the mono-substituted molecules. Theoretical calculations were also used to analyze the character of the excited states; 2,5-dimethoxyphenyl-pyrene alone exhibited an intramolecular charge transfer character for the excited state, which was responsible for the solvatochromism effect. The dynamics of the excited states were analyzed using time-resolved fluorescence measurements, in which a characteristic increase of the fluorescence intensity was observed for 2,5-dialkoxyphenyl-pyrene; this observation was supported by the theoretical calculations as well.

Graphical abstract: Experimental and theoretical investigation of fluorescence solvatochromism of dialkoxyphenyl-pyrene molecules

Back to tab navigation

Supplementary files

Article information


Submitted
06 Oct 2017
Accepted
01 Nov 2017
First published
01 Nov 2017

Phys. Chem. Chem. Phys., 2018,20, 3258-3264
Article type
Paper

Experimental and theoretical investigation of fluorescence solvatochromism of dialkoxyphenyl-pyrene molecules

F. Lu, N. Kitamura, T. Takaya, K. Iwata, T. Nakanishi and Y. Kurashige, Phys. Chem. Chem. Phys., 2018, 20, 3258
DOI: 10.1039/C7CP06811E

Social activity

Search articles by author

Spotlight

Advertisements